From which side is it suggested that you may have less time to react to hazards?

The nearside is the correct answer because driving on the left side of the road in the UK means that a driver's nearside is closer to the kerb and often has less visibility for approaching hazards. When you are on the nearside, your view of the road is often obstructed by parked vehicles or other obstacles, which can limit your ability to see potential dangers quickly. Since you have a reduced line of sight, this can lead to a situation where you have less time to react to any hazards that may suddenly appear.

In contrast, the offside offers better visibility due to the configuration of the road, where many hazards can be more easily spotted. The front allows for a good view of hazards ahead, and while there may also be limited time to react if you are close, it generally provides clear sight lines. The rear, while important to monitor, is not usually considered a primary area when assessing immediate hazards that may require quick reaction. Therefore, the unique characteristics of the nearside drive home the importance of awareness in this area while navigating the streets.